The Islamic State group has released a photo of the bomb it says was used to bring down a Russian passenger plane in Egypt's Sinai Peninsula last month, killing all 224 people on board.

U.S. Intelligence officials are virtually certain the Metrojet airliner that crashed in the Sinai peninsula was brought down by a bomb. The prime suspect is an ISIS affiliate that has taken claim all along.

Russian President Vladimir Putin has ordered a halt to all Russian flights to Egypt and told authorities to repatriate Russians in the Red Sea resort of Sharm el-Sheikh pending an investigation into Saturday's plane crash in the Sinai.